rtty: throttle the amount of data being pushed to the server

The socket died when too much data was sent too fast

Fixes: WIFI-12334
Signed-off-by: John Crispin <john@phrozen.org>

feeds/ucentral/rtty/patches/300-throttle.patch

@@ -0,0 +1,31 @@
+Index: rtty-7.1.4/src/rtty.c
+===================================================================
+--- rtty-7.1.4.orig/src/rtty.c
++++ rtty-7.1.4/src/rtty.c
+@@ -36,6 +36,8 @@
+ #include "utils.h"
+ #include "command.h"
+ 
++#include <poll.h>
++
+ extern int force_exit;
+ extern int connected;
+ 
+@@ -84,7 +86,7 @@ static void pty_on_read(struct ev_loop *
+     struct tty *tty = container_of(w, struct tty, ior);
+     struct rtty *rtty = tty->rtty;
+     struct buffer *wb = &rtty->wb;
+-    static uint8_t buf[4096];
++    static uint8_t buf[32* 1024];
+     int len;
+ 
+     while (1) {
+@@ -394,6 +396,8 @@ static void on_net_write(struct ev_loop
+ 
+     if (buffer_length(&rtty->wb) < 1)
+         ev_io_stop(loop, w);
++
++	poll(NULL, 0, 100);
+ }
+ 
+ static void on_net_connected(int sock, void *arg)